High Performance Regenerative Receiver DesignQEX November 1998, pp. 24-36A discussion about regenerative receiver design and construction. Warning--the AD745JN has been replaced by the AD745KR which has a different pinout. Fortunately, many single 8 pin DIP op amps, such as the NE5534, can be substituted with no changes to the circuit.

A Binaural I-Q ReceiverQST March 1999, pp. 44-48A receiver replaces the narrow filters and interference-fighting hardware and software of a conventional radio with a wide-open binaural I-Q detector. Picture listening to a chunk of the band in stereo with the signal you want smack in the middle.

An HF 50-W Linear Amplifier
ARRL Handbook 1995, pp. 17.93-17.97If your QRP transmitter runs 1 to 2 watts, and you would like a little more power. Build this amplifier using a pair of Motorola MRF477s. This part is out of production and may be difficult to find, even though it was around for many years. Template available

The Principles and Building of SSB Gear -- Part 1QST September 1985, pp. 17-19This intermediate-level series is aimed at those who want to build a small SSB transmitter and learn how SSB equipment operates. A practical project is described throughout the series.Feedback QST November 1985, p. 43 (included in above PDF file)

The Principles and Building of SSB Gear -- Part 2QST October 1985, pp. 27-30We'll examine the speech amplifier, balanced modulator, filter, IF amplifier and carrier generator of an SSB generator.Feedback QST March 1986, p. 46 (included in above PDF file)